Strap tightening and holding device



W. A. KUHLMAN STRAP TIGHTENING AND HOLDING DEVICE Aug- 17 1926.

Filed Feb. 11, 1924 I y the openingt'i Patented Aug. 17, 1926 UNITEDSTATES PATENT OFFICE;

WILLIAM A. KUI-ILMAN, OF TOLEDO, OHIO.

STRAP TIGI'I'IENING AND HOLDING DEVICE.

This invention relates to adjustable fast- This invention has utility asa clamp for assembling and holding a binding strap or strip,

drawings buckle or as in assembling sections for concrete forms. Y I

Fig. 1 is a perspective view showing an embodiment of the invention as afastener for concrete forms;

Fig. 2 is a plan buckle or View, with parts broken broken away In theassembly of as in connection w tures,

are built up g respond to the genera be formed.

of the buckle of Fig. 1 on an enlarged Fig. 3 is a side elevation-of thebuckle of i'iig. 2, parts being and he device.

forms for poured struc-' ith concrete, panels enerally to standard sizesto l shape of the work to The columns may be round,

polygonal or other shapes. In the instance shown herewith there i shape.The p anel'is shown as c boards 1 assembled by panels are assembled tostructure to be poured.

tie strips is desirableto have these panels clamped in assemb hold upwhen the concrete is pou these forms are only left into. Inasmuch as inposition until the then removed,

1 may be had quickly sufficiently set and portant and conveniently.

that this remova Furthermore,

as these panels are re-used, it is may not mutilate the that the removalpanels.

To this end the panels s taken a rectangular omprising 2. These defineand hold the Asso grouped it bound or led relation to resist or redtherepoured structure is it is iminasmuch, desirable as herein disclosedare assembled by strips or straps In dra iron brough position as aneffective holding, t and clamping means. 7

prises fastener. having a plate l rising therefrom, 5 therein.

In bringing this plate 3, say of hoop iron, which may be of 51X- teen oreighteen gauge. hoop iron about the group desirable to have such wingthis of panels it is t to a taut ightening,

herein disclosed conibuckle or into use the hoop iron 3 has portion 6bent back on itself to provide a an ordinary nail o duced. By havingloop 7 protruding through Into this 100137, a pin, as ike 8, may beintro n 6 of the may place a.

panels as extending through-the opening 5 and "back. along. the panel,this end. 6 is clamped by the under side of the strap against. the paneland there is minimized any tendency of this end of the strip to workloose fromthe base 4. i

Rising from this plate 1 of the main base is a pair of brackets 9 mergintoward the frame 5. These brackets have earing-providing openings 10 inis provided with a slot 12 through which may extend end portion 13. Asthreaded through the slot 12 this end portion 13 may even protrudethrough the slot 12 to have, bent over portion 14L. This threading ofthe end of the strap 3 into the slot 12 ofthe pin 11 may be as the pin11 is thrust from one opening 10 to the other or' after the pin 11 hasbeen inserted in both openings 10 as rising from the plate 4.. WVhen soassembled and with this end 13 of the strap 3'threaded therewith, itssquarehead 15 engaged by a wrench or other tool, and turned to wind thestrap 3 into taut. condition for effectively clamping; or binding thecolumn panels-in as sembl'ed relation. The pin 11 may be keyed againstremoval from the base by nail 16 or other pin fastener through opening17 to thereby serve as a key. In the winding of this strip 3 about thepin 11, if such winding be over the pin 1.1 instead of under, there ismore positive holding action for this fastener into snug positionagainst the panel. Openings 18 in the head 15 may receive pin or nail 19of a length to engage the base 4 and hold the pin fromunwinding. Thenail 16 may be of such length as not only to be used as key but to serveto prevent unwinding of the pin 11 by engaging the plate 4.

In the tightening of the strap 3 there is in many instances requirementfor rather close clamping adjustment to be obtained with speed; To thisend the head 15 of the pin 11 is provided with a ratchet portion 20 withwhich may be engaged by pawl 21 having trunnion 22 extending throughopening 23 in one of the brackets 9. The operator finger on the pawl asthe pinis being set up to'urge the pawl into a ratchet seat. Bythismeans there is. close angular adjustment over a wide range for this pin11. The trunnion 22 is of such size that by a stroke from a hammer itmay be sentinto the pin 11 may have opening 0 with the keyQpin or nailheld in openings while the lead intothe pin;11 (if the strip 3 261Tilismeans that in the connections to thisdexzice such maybe at acorneror even threughslot or opening bridged by this de- 16 r fllhis' fastenermay serveas a panel assembly ,for forms othenthan columns. Girder panels27 have their open topportions sg iaced bybraces 28 an d the strap 3withthis base i, 9, l0 and 11 connected for clamp assembly of suchgirder forms.

VJ hen the concrete has been poured into the structure and sutlicienttime has elapsed lorthe desired set, it is only necessary for theworkmen to come to :the device of this disclosure, knock out nails 8 andthe device is at once free, as the strap 8 is thus loosened from thepanels. The strap 3 may be discarded or it may be ,re-used as itscondition may warrant, It is thus seen that there is disclosed herein asimple, effective and substantial fastener of ample tightening capacitywhich is capable of time saving use vin assembling and knocking downforms inconnection with poured structures.

What is claimed and it is desired to secure by Letters Patent is 1.Strap tightening and holding means.

including a base providing a plate portion ma be throu h the oaenin"1,5ee,1ss

looped strap endheld in said seat by the strap, sa-id brackets providingbearings and a pin 'rotatablv mounted in said bearings for engaging theopposite end of the strap.

2. Strap tightening and holding means including a hase, a pin reversibleend for end in said base for winding'in different directions as to saidbase, said pin having a seat for receiving a-strap end saidbase haw .ingbearings for said pin, and. checking means rernovably mountable withsaidbase for swinging into pin engaging position, sa i d baseproviding oneseat for the checking means with the pinmounted for-one direction ofwinding and alsecond seat for the chec ing means w ieirthe pin ismounted for ,IQB dir c fwindins- Strap tightening and holding meansincluding a moun ng uni i emr i ins a e plate and a pair of opposingupstandbr'ackets, said unit having a slot for the looped vend of astrap, a pair of seatsgadjacent said slot, a rod through the looped cnoresting in said seats, there being seats in the brackets parallel tosaid rod, a pin rotatably mounted the bracket seats for engaging theother end of v the strap, a ratchet fixed to the pin,a nd ratchetengaging means pivotally mounted on the bracket of said unit toward thebase plate from said pin and between said pin and rod.

In witness whereof I atliz; my signature.

WILLIAM A. KUHLMAN.

